Mumble is a voice chat application for groups. While it can be used for any kind of activity, it is primarily intended for gaming. It can be compared to programs like Ventrilo or TeamSpeak. People tend to simplify things, so when they talk about Mumble they either talk about "Mumble" the client application or about "Mumble & Murmur" the whole voice chat application suite.
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to install third party programs that are not required.
These may include a toolbar, changing your homepage,
default search engine or installing other party programs.
Please watch the installation carefully to opt out.